Hmm, I think you might have just helped me solve something. Not every time but quite often I place the car in reverse and it screams the solid warning tone that I have an object inches or possibly touching my front bumper (yet there is nothing near it).. Big red bar across the entire length of the front sensor on the display. The warning seems to last for 1 or 2 seconds then disappears yet sometimes as I continue to reverse it will once again scream out the same warning as if I'm all but touching some object directly in front of the car.